Giro Air Attack Shield (2) and Air Attack
For eyeglass wearers, very handy.
For non-eyeglass wearers, very handy.

Pros:
Reasonably cool.
Shield easily removed and can be clipped “up” out of the way.
Much better rain vis...your eyes can focus down range.
Aero if you’re fast enough.

Cons:
There are cooler helmets; especially sitting still on a scorcher.
Handling without care can result in broken shields.